Cook potato in boiling water to cover 15 minutes or until tender; drain. Transfer to a bowl; beat potato at medium speed of an electric mixer until smooth. Add cream cheese and next 4 ingredients; beat well.
Cut hard-cooked eggs into quarters. Shape 1/4 cup potato mixture around each egg quarter to form an egg shape. Brush each with egg white; roll in cracker crumbs. Place on a baking sheet coated with cooking spray. Bake at 400° for 5 minutes or until browned.
Snap off tough ends of asparagus. Remove scales from stalks with a knife or vegetable peeler, if desired. Arrange asparagus in a steamer basket over boiling water. Cover; steam 7 minutes or until crisp-tender. Drain.
Combine sour cream and next 3 ingredients; stir. To serve, arrange 3 asparagus spears and 3 baked egg quarters on each of 4 lettuce-lined serving plates. Top each serving with 3 tablespoons sour cream mixture. Garnish with chopped fresh chives, if desired.